Core for glass molds



Patented Nov. 16, 1943 [donat on GLAssMoLns Raymond A. SenkbeiLBaltimore,Mdg'assignorto v zMaryland Glass Corporation, Baltimore, Md.,;a

corporation otMaryland- Application Febrnary l0,1942, Serial N0. ,soiaims. (CI.' 49-16) integrally formed ring is located on thecore so' thatit will be moved with the core into flat con tact with the bottom face of the mold. However, the shell of the mold is formed of castiron and due to the intensity of the heat which is radiated through the mold, said shell becomes quite brittle and when the solid mass of metal in the form of a ring is moved into engagementwlththebottom of the mold simultaneously with the, insertion oi the integrally formed core, the impact is at times; sufiiciently great to crack or break parts of the mold.

It is an object of the present invention to pro-" vide a core and a cooperating ring which willpreventfracture of the mold or associated parts when thecore is forced into an opening in the bottom ofthe mold, since the ring is slidably mounted on the outer wall of the core and movable relatively to the core so that when the core is moved into the mold the ring will likewise move upwardly but due to the cushioning effect of springs whichsupport the ring on the base of the corepressure will be progressively increasedon the ring while: eliminating'the usual jarring action of the ring against the bottom of-the mold; .l A further object of the invention isthepro- Vision of a core for glass molds in which a ring' 'is slidably mounted on the core with a'plurality of springs and rods for supporting the ring on the baseof the core so that-When the core ismoved inwardly into the usual passage in the bottom of the core where the neck of the bottle is formed;

' inga, part of the-specification nevertheless itjis to be understood that'the invention is not-con-- fined to the disclosure being susceptible of such changes and modifications as define no material departure from the salient features of the-invention as" expressed inthe appendedclaims.

In the drawing: a ra V, Figure 1 is a view in elevation of a core for glass molds shown inan inoperative position a.

Figure 2 is a. horizontal section takn along the line 2-2 ofFignl.

Figure 3 is a horizontal section taken along theline33ofFig.1.- a w Figurerlv is a verticalsection similar 'to that shownjn -Fig.r 1,;but disclosing the core anda cooperating. movable ring-m an operative posi tion on the bottomof a mold;

Referring more particularly tothe drawirig,

- designates thelowerend of amoldv'for forming glass bottles which has a' circular Passage H in the lower end -with an annular. groove, l 2 to re ceivemolten materials'to-providean external rib ointhev outersurface ofi the neck of a bottled) The, sleeve {[3 extends, downwardly ,rmmni mold l0 and hasia' flared mo'uth 14 at its lower end. ;The sleeve, I3 may-be sl pportedin anyap:

proved manner fromilthe mold lo and since this part formsno portion'ofthe invention .n'olvdetails of the oonnectionwillbedescribedL V v Inthes'etypesfof machinesv the core is automatically moved into; place in the'passagei for the mold It by anarm'which is not shown the present construction. ,Thisjarm is adapted to be moved upwardlyfforfforcingv the, core into the said ring will be moved; up and will lightly engage the. bottom of the mold while continued move ment of the core into the mold will cause the 'plu rality of springs to exert a progressively increas ing pressure on the ring and sufficient to hold the 'ring in place so that passage in the bottom of the mold will be closed by forming the neck of the passage at. aboutv the tim'e the molten mass of lassis poured intqtheupper end of thegmold. In' other words,thecore must be'cente'red'rand must be in operative position within themojldlto' prevent the lossof molten glass from saidimold. A core 20 is providedwith areducedlupperend. as shown at 2|, and'this core is hollow asindi+ c'ated at zzfth'roughout its'length except that the extreme upperfend of the core as shown at 23, is

u fl nd c e eyh ll fwipe s llt- The core is provided with a baseJZB, which is cylindrical in shape andhas agreater diameter than the body of, the core't20.1"SaidbOdylisPro vided at its upper end'withanannular groove 26 which formsan annular shoulder at receive the lower ends of coil springs 21 which are spaced around the core 20 at approximately degrees apart. The body is also provided with a plurality of vertical passages 30 to receive rods 3| which I have their upper ends as shown at 32 threaded into pockets in a ring 33. This ring is slidably mounted on the core at its lower end and where the core is substantially cylindrical.

The base of the core is provided with pockets which receive the heads 36 of the rods 3|. Since the ring 33 is rigidly connected with the upper ends of the rods 3| said rods riding in the passages 30 will aid in centering the ring with respect to the cylindricalcwalls .40 ofthe membec I3. Since the ring 33 neatly fits within the walls the core 20 will likewise be centered with respect to the passage II in the mold I0.

The base 25 of the mold 20 is connected to an a of the mold II). As the core ism'oved'upwa'rdly;

and the outer closed end 236mm; hollow core,

' the mold' I 0. However, continued upwardpressure on the base 25 of the core wilicause the core to move upwardly int'o themold'while the progressively increasing'pressure will be exerted on the coil springs 2-1 untll the core and the ring 33 reach the positions shown in Fig; 4' 'with the springs'Tl-Iully compressed. Thering'is provided with a groove adjacent theouter-walls' of the core 20 in-order topro'videa finish for-theouter end" of the neck M c! the bottle which is being formed"intheinitialstps; 'I'hu's-it" will be seen ring, and a coil spring on each rod located between theringand shoulder, saidsprings adapted to be compressed when the core is moved inwardly of the cylinder for forcing the ring against the v I a 1 arm of a machine for automatically moving-thew bottom ofthe neck formmg portmn of the m0 d core through the passage I I into the hollow body 2. In a molding apparatus, a, cylindrical core,

' a moldhaving an open-ended chamber and a neck-forming chamber opening at its lower end into the first chamber, the first chamber having a greater cross-sectional area than the second chamber, the top of the first chamber forming a shoulder surrounding the lower open end of the second chamber, said core located in the first chamber and adapted to be moved into the neck- 7 forming chamber, the core having a base portion that the ring not only'closes' that-portion of the passage IIrwhiclr is spaced from-the outer-walls oi" the" core 20 but" it also aids in outer end of the'b'ottle. n

'The base oftheicoreis provided with 'a' cylindrical portion "bel'ow'tlie bottomsot the'springs- 21 and since thiscylindrical' portionhasthe same" diameter as the external annular surface of the ring 30, it will also cooperate-with thering for I guiding'th'ecore' centrally'fof the passage II.

Since'the upper end or. each spring 21 engagesthe shoulde 2 6'? at: the piston or cylindrical por-' tion 41 these springswili be compressedbetween the'shoulder 2s and the ring 30', but the cushioningof the ring on the springs will prevent the ring. from coming into contact with the; bottom of' the mold in a sharp impact and thusf the cushioning of theringjwi'll' preventinjury to the mold and likewise the ring. willnnot be injured when it comes in contact with the bottom "of the mold. V r

1. Inamolding apparatus, a core, a mold hav ing'an opening'in the bottom thereof and a neckfo'r'ming chamber at the upperendsaid core hav in'g a base portion of greater cross-sectional area than the core and providing a shoulder between the base portion and the core-said core having a diameter less than'theflnecl'r-forming' chamber to provide an annular space between the wall of the neck-forming chamber and the core when said core is proiectdthrough said neck-forming of greater. diameter than the core, thereby providinga shoulder between the core and base member, a cylinder embracing the base and providing a slidable support for said base portion for centeringithecore' in the mold, a ring slidable on the core, with the outer periphery slidably received byqthe wall of the openrended chamber, a plurality of rods having the inner ends thereof. secured to the ring and acoil spring surrounding each rodand located between .the secondlshoulder andlfthe 'uhderface of the'ring, said coil springs, adapted .to be, compressed when the'core isvmoved the neckeform'ing chamber for forcing; the ringagainst, the firstrmentioned shoulder, and,

cooperating with the core for closing the lower enact, the neckefo'rming chamber.

3} In, a, molding. apparatus .a cylindrical core, a mold having an. open-ended. chamber and a neck-forming chamber opening at its lower end into the first chamber, the first chamber having a greater cross-sectional area that the second chamber,.the;top of the firstchamber forming a shoulder surrounding the lower open end of the second chamber, said, core located in thefirst chamberand adapted to be moved into the neck-e forming chamber, the corehaving a base portion of greater diameter than .the core, thereby providing ashoulder between the core and base memher-{a cylinder embracing thebase and providing a ,slidabl'e support for said 'base portion for centering the core in the mold, a ring slidable on the-core, with the outer, periphery slidably received by the wall of the open-ended chamber, a plurality of rods having the inner endsthereof secured tothe ring and a coil spring surrounding each rod and located between the second shoulder and'the under face of the ring, the upper face 7 of the ring having an annular groove, the walls of which completingthe mold for the neck-forming chamber, said coil springs. adapted to be compressed when the core is moved into the neckforming chamber. forforcing the ring against the first-mentioned shoulder and cooperating with the core for closing the lower end of the neckforming chamber, 7

'7 T RAYMOND A- SENKBEIL. 

